Hello, I need a new Head Button (combustion Chamber) part #G70357-19 for a CEN GST 7.7. The picture of the part in your online store looks nothing like the part in my parts catalog or the Button that came off the truck. The one pictured in your online store has the same part # but I assure you that it will not fit this truck. Please help!! By the way, been running RC cars for 25 years and had the GST the last 4.... This is my favorite and my Pride and Joy. I named him "Stomper" but My Kids call him Stinky.

Hello I have a Cen 7.7 nitro which i think is a .46 ?? 3 speed forward and reverse, I got it new unused and have run it all in and now put 2.5litres through it but can not get it to change gears not matter how hard i rev it, can u tell me what to set the 2nd and 3rd gears to to get this to happen. They both have the silver spring in them and i have taken them out as evenly as i can I have 2nd at 7 turns out and 3rd at 9 and still nothing

Hello I have a Cen 7.7 nitro which i think is a .46 ?? 3 speed forward and reverse, I got it new unused and have run it all in and now put 2.5litres through it but can not get it to change gears not matter how hard i rev it, can u tell me what to set the 2nd and 3rd gears to to get this to happen. They both have the silver spring in them and i have taken them out as evenly as i can I have 2nd at 7 turns out and 3rd at 9 and still nothing

If the 2nd speed is set incorrectly, whether too early or too late, the 3rd speed will never shift. However, if you never hear the 2nd speed shift, its probably because its set to shift either instantly when the truck takes off or its set to never shift

Please review the attachment and adjust the shift point accordingly.

P.S. You also have to use 30% fuel and set the engine correctly for it to produce enough power/RPM. 30% is a MUST